Đáp án:
a,13,95:($\frac{3}{4}$ +$\frac{4}{5}$ )
= 13,95:1,55
= 9
b, $\frac{16^{3}.25^{2}.162 }{8^{4}.3^{2}.375 }$
= $\frac{(8.2^{3}) .5^{4}.162 }{{8^{4}.3^{2}.375 } }$
= $\frac{8^{3}.2^{3} .5^{3}.5.162}{{{8^{4}.3^{2}.375 } }}$
= $\frac{2^{3}.5^{3}.5.162}{8.3^{2}.375}$
= $\frac{125.5.162}{9.375}$ = $\frac{5.162}{9.3}$ = $\frac{5.18}{3}$ =30